Dwarf Cannon size

For my dogs of war army i'm thinking about using the dwarf cannon model for a DOW cannon as the empire great cannon is to big, but does anybody know how it would look with human crew i'm not sure if it would be too small for the crew?

Policeman: So you haven't seen this man?

Edward: No, we haven't seen anyone

Policeman walks to door

Tubbs: (yells) We didn't burn him!

Edward scowls

Policeman: What?

Tubbs and Edward stand outside their Local Shop around a bonfire, Edward throws a policemans helmet on the bonfire